E.D.R. - Ratings for Every Darn Radiator - this book covers the ratings of extremely old radiators, including nearly every radiator made between 1850 and 1950. A lot of the original manufacturer's specifications on these radiators and convectors are included, as well as pictures of most of these boilers that will help you recognize the type of unit you are servicing on the job. This book is meant to assist technicians in the field and is extremely handy to have on a daily basis.
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